You guys make a big deal out of this. Mentally replace "demons"
  with "mental disorders". Does it work? Yes? Then let it be.
  Sheesh. === Mental disorders have no physical cause, otherwise
  they'd be physical disorders. They're not considered real in
  every country for a good reason. They're primarily social
  disorders. Their reality is contingent upon cultural values. ===
  Fair enough. Nevertheless, in the particular context, Demons
  can't be bombed into submission and Mental Disorders can't be
  bombed into submission are equally valid from a pragmatic
  standpoint. I guess I was lucky to have only rarely been exposed
  to "true believers". I heard about them. Seemed downright
  mythological, as there were always more people talking _about_
  how awful true believers were, then me actually seeing any in
  real life. [usually on TV or online] I mean, I believe they
  exist 'cause TV says so and ppl complain about them. But I've
  just been lucky I suppose. I'm agnostic now, but growing up
  (Methodist), we were taught that what they called demons then,
  we'd call mental disorders now. Old fashioned way of saying the
  same thing. Made sense. Then again, we were also taught that
  people who refused medical treatment on "faith alone" were
  idiots and kinda deserved to die of their own stupidity, sad as
  it was.